18915393

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47407}}^1$

素因数の和:47436

約数の個数: 16

約数和(自身を含む): 30341120

約数和(自身を除く): 11425727

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 47407, 142221, 331849, 900733, 995547, 2702199, 6305131, 18915393]

約数ペア:

[(1, 18915393), (3, 6305131), (7, 2702199), (19, 995547), (21, 900733), (57, 331849), (133, 142221), (399, 47407)]